Improvement in machines poe bending metals



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"nonnnr Porre, or Charnan, New YORK.

Lettere Patent No. 69,936, dated October 15, 1867.

IMPROVEMENT IN MACHINES FOR BNDING METALS.

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Be it known that I, ROBERT Iorrs, of Chatham, in the county of Columbia, and State of New York, have invented a new and usci-inl Machine for Bending Circles for the front axles of Wagons; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figurc '1 is a perspective view. Y.

Figure 2, a longitudinal elevation of the sweep or revolving lever detached.

Figure 3, a sid-e (view of the slotted slidingframe which carries the grooved press-pulley or roller.

The nature of my invention consists in attaching an iron circle or ring of any required diameter to a bedplate of east iron, and by means of a revolvingswcep with rollers attached, forming a circle of iron of the same curvature as the ring around which it is formed.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation. A

The entiremaehinaexcept the screws used, should be made of cast iron. Upon the bed-plate pp I attach firmly, by means of the-set-screws v v o, one of the circles C, (two of which are represented on the drawings,) oi' the size or curvature `rcnuired for the cirolc to be bent, Thisring or forming circle C should be ot' greater thickness than the iron b' intended to be bent, to afford a suiiicient bearing. An upright shaft or revolving post, B, passes through the bottom of the bed-piece pp', and is secured from withdrawing by a nut at the bottom end, and is supported above by the tripod-brace g gg. The thumb-screwnsecures the sweep or revolving lever A to the head of the upright To this sweep are attached two press-rollers or pulleys E F. The top roller E is more or less grooved to fit the oval, hali` round, or other shaped iron, and the thumb-screw a is employed to regulate the pressure of. this pulley or roller, by applying it to the top of the boX-piecee which supports the shaft or axle t'. This box-piece e is connected with the sliding frame'D, and forms part of it',(see figs. 2 'and The roller or pulley F, which revolves at right angles to E, is secured to the sweep A by means of two ixcd journals, in which its axle or shaft i revolves. This .roller is adjusted, and its pressure against the outside of the rod to be bent, regulated, by means of the set-screw n, in the head of the revolving centre-post B.

Its operation is easily understood. The clips c c having been welded tothe circle iron, it is then heated to redness, ornearly so, throughout its entire length. One end is then placed under the set-screw le and firmly fixed; the sweep A is then brought round, so that the press-rollersE and'F are in contact with the iron to be bent. The slotted frame, fig. 3, which carries the grooved pulley or roller E, is movable on the screws ff, so that it can be quickly moved back to allow it to pass outside the clips. Having passed the first it is moved up again and the roller applied to, the top of the circle-bar b, which keeps it close to the table or bed-platep p', until 4by the revolution of the sweep thc second clip is reached, when it is slipped back asbefore, until that is passed, and then again applied. In the mean time the roller F has all the While been doing its work of pressing the 'circle-iron close against the forming ring C, and giving it the curvature required. The bed-piecep p may be attached to a firm table or bench, or be supportedon legs of'convenient height. The dotted lines b, fig. 1, indicate the position ofthe circle-rod before being bent Ato the position or form represented by Zu What I claim as my invention, and desire to secure by Letters Patent, is,-

, The adjustable frame D, arranged as specified, in combination with the sweep A, substantially as and for the purpose described.

ROBERT POTTS.

. Witnesses:

ALEX. S. RowLnY, Jas. D. FULLER. 

